I would like to use one of the zones on my Rachio to periodically fill a small reservoir on an outdoor fountain. Is there a way to setup the Rachio to periodically just turn on a dripper for a set amount of time to keep the reservoir full? Thanks.

@JPedrego is correct you will need to setup a separate fixed schedule on your device.

In addition. make sure you turn off weather intelligence. Also, I would have this schedule run independently of your other schedule because if these are set up with weather intelligence, climate skip, etc…they can then obtrude, which can effect this specific schedule.